Ocean circulation and sea-ice thinning induced by melting ice shelves in the Amundsen Sea
A 1/12° ocean model configuration of the Amundsen Sea sector is developed to better understand the circulation induced by ice shelf melt and the impacts on the surrounding ocean and sea ice. Eighteen sensitivity experiments to drag and heat exchange coefficients at the ice shelf/ocean interface are...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | https://eprints.soton.ac.uk/406146/ https://eprints.soton.ac.uk/406146/1/jgrc22155.pdf |
id |
ftsouthampton:oai:eprints.soton.ac.uk:406146 |
---|---|
record_format |
openpolar |
spelling |
ftsouthampton:oai:eprints.soton.ac.uk:406146 2023-07-30T03:56:04+02:00 Ocean circulation and sea-ice thinning induced by melting ice shelves in the Amundsen Sea Jourdain, Nicolas C. Mathiot, Pierre Merino, Nacho Durand, Gaël Le Sommer, Julien Spence, Paul Dutrieux, Pierre Madec, Gurvan 2017-03-30 text https://eprints.soton.ac.uk/406146/ https://eprints.soton.ac.uk/406146/1/jgrc22155.pdf en English eng https://eprints.soton.ac.uk/406146/1/jgrc22155.pdf Jourdain, Nicolas C., Mathiot, Pierre, Merino, Nacho, Durand, Gaël, Le Sommer, Julien, Spence, Paul, Dutrieux, Pierre and Madec, Gurvan (2017) Ocean circulation and sea-ice thinning induced by melting ice shelves in the Amundsen Sea. Journal of Geophysical Research: Oceans, 122 (3), 2550–2573. (doi:10.1002/2016JC012509 <http://dx.doi.org/10.1002/2016JC012509>). Article PeerReviewed 2017 ftsouthampton https://doi.org/10.1002/2016JC012509 2023-07-09T22:13:27Z A 1/12° ocean model configuration of the Amundsen Sea sector is developed to better understand the circulation induced by ice shelf melt and the impacts on the surrounding ocean and sea ice. Eighteen sensitivity experiments to drag and heat exchange coefficients at the ice shelf/ocean interface are performed. The total melt rate simulated in each cavity is function of the thermal Stanton number, and for a given thermal Stanton number, melt is slightly higher for lower values of the drag coefficient. Sub ice shelf melt induces a thermohaline circulation that pumps warm circumpolar deep water into the cavity. The related volume flux into a cavity is 100 to 500 times stronger than the melt volume flux itself. Ice-shelf melt also induces a coastal barotropic current that contributes 45±12% of the total simulated coastal transport. Due to the presence of warm circumpolar deep waters, the melt-induced inflow typically brings 4 to 20 times more heat into the cavities than the latent heat required for melt. For currently observed melt rates, approximately 6% to 31% of the heat that enters a cavity with melting potential is actually used to melt ice shelves. For increasing sub ice shelf melt rates, the transport in the cavity becomes stronger, and more heat is pumped from the deep layers to the upper part of the cavity then advected towards the ocean surface in front of the ice shelf. Therefore, more ice shelf melt induces less sea ice volume near the ice sheet margins. This article is protected by copyright. All rights reserved. Article in Journal/Newspaper Amundsen Sea Ice Sheet Ice Shelf Ice Shelves Sea ice University of Southampton: e-Prints Soton Amundsen Sea Stanton ENVELOPE(-128.689,-128.689,69.800,69.800) Journal of Geophysical Research: Oceans 122 3 2550 2573 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
A 1/12° ocean model configuration of the Amundsen Sea sector is developed to better understand the circulation induced by ice shelf melt and the impacts on the surrounding ocean and sea ice. Eighteen sensitivity experiments to drag and heat exchange coefficients at the ice shelf/ocean interface are performed. The total melt rate simulated in each cavity is function of the thermal Stanton number, and for a given thermal Stanton number, melt is slightly higher for lower values of the drag coefficient. Sub ice shelf melt induces a thermohaline circulation that pumps warm circumpolar deep water into the cavity. The related volume flux into a cavity is 100 to 500 times stronger than the melt volume flux itself. Ice-shelf melt also induces a coastal barotropic current that contributes 45±12% of the total simulated coastal transport. Due to the presence of warm circumpolar deep waters, the melt-induced inflow typically brings 4 to 20 times more heat into the cavities than the latent heat required for melt. For currently observed melt rates, approximately 6% to 31% of the heat that enters a cavity with melting potential is actually used to melt ice shelves. For increasing sub ice shelf melt rates, the transport in the cavity becomes stronger, and more heat is pumped from the deep layers to the upper part of the cavity then advected towards the ocean surface in front of the ice shelf. Therefore, more ice shelf melt induces less sea ice volume near the ice sheet margins. This article is protected by copyright. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Jourdain, Nicolas C. Mathiot, Pierre Merino, Nacho Durand, Gaël Le Sommer, Julien Spence, Paul Dutrieux, Pierre Madec, Gurvan |
spellingShingle |
Jourdain, Nicolas C. Mathiot, Pierre Merino, Nacho Durand, Gaël Le Sommer, Julien Spence, Paul Dutrieux, Pierre Madec, Gurvan Ocean circulation and sea-ice thinning induced by melting ice shelves in the Amundsen Sea |
author_facet |
Jourdain, Nicolas C. Mathiot, Pierre Merino, Nacho Durand, Gaël Le Sommer, Julien Spence, Paul Dutrieux, Pierre Madec, Gurvan |
author_sort |
Jourdain, Nicolas C. |
title |
Ocean circulation and sea-ice thinning induced by melting ice shelves in the Amundsen Sea |
title_short |
Ocean circulation and sea-ice thinning induced by melting ice shelves in the Amundsen Sea |
title_full |
Ocean circulation and sea-ice thinning induced by melting ice shelves in the Amundsen Sea |
title_fullStr |
Ocean circulation and sea-ice thinning induced by melting ice shelves in the Amundsen Sea |
title_full_unstemmed |
Ocean circulation and sea-ice thinning induced by melting ice shelves in the Amundsen Sea |
title_sort |
ocean circulation and sea-ice thinning induced by melting ice shelves in the amundsen sea |
publishDate |
2017 |
url |
https://eprints.soton.ac.uk/406146/ https://eprints.soton.ac.uk/406146/1/jgrc22155.pdf |
long_lat |
ENVELOPE(-128.689,-128.689,69.800,69.800) |
geographic |
Amundsen Sea Stanton |
geographic_facet |
Amundsen Sea Stanton |
genre |
Amundsen Sea Ice Sheet Ice Shelf Ice Shelves Sea ice |
genre_facet |
Amundsen Sea Ice Sheet Ice Shelf Ice Shelves Sea ice |
op_relation |
https://eprints.soton.ac.uk/406146/1/jgrc22155.pdf Jourdain, Nicolas C., Mathiot, Pierre, Merino, Nacho, Durand, Gaël, Le Sommer, Julien, Spence, Paul, Dutrieux, Pierre and Madec, Gurvan (2017) Ocean circulation and sea-ice thinning induced by melting ice shelves in the Amundsen Sea. Journal of Geophysical Research: Oceans, 122 (3), 2550–2573. (doi:10.1002/2016JC012509 <http://dx.doi.org/10.1002/2016JC012509>). |
op_doi |
https://doi.org/10.1002/2016JC012509 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
122 |
container_issue |
3 |
container_start_page |
2550 |
op_container_end_page |
2573 |
_version_ |
1772810790445776896 |